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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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TCFLUSH(3P) POSIX Programmer's Manual TCFLUSH(3P)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
tcflush — flush non-transmitted output data, non-read input data,
or both
#include <termios.h>
int tcflush(int fildes, int queue_selector);
Upon successful completion, tcflush() shall discard data written
to the object referred to by fildes (an open file descriptor
associated with a terminal) but not transmitted, or data received
but not read, depending on the value of queue_selector:
* If queue_selector is TCIFLUSH, it shall flush data received
but not read.
* If queue_selector is TCOFLUSH, it shall flush data written
but not transmitted.
* If queue_selector is TCIOFLUSH, it shall flush both data
received but not read and data written but not transmitted.
Attempts to use tcflush() from a process which is a member of a
background process group on a fildes associated with its
controlling terminal shall cause the process group to be sent a
SIGTTOU signal. If the calling thread is blocking SIGTTOU
signals or the process is ignoring SIGTTOU signals, the process
shall be allowed to perform the operation, and no signal is sent.
Upon successful completion, 0 shall be returned. Otherwise, -1
shall be returned and errno set to indicate the error.
The tcflush() function shall fail if:
EBADF The fildes argument is not a valid file descriptor.
EINVAL The queue_selector argument is not a supported value.
EIO The process group of the writing process is orphaned, the
calling thread is not blocking SIGTTOU, and the process is
not ignoring SIGTTOU.
ENOTTY The file associated with fildes is not a terminal.
The following sections are informative.
None.
None.
None.
None.
tcdrain(3p)
The Base Definitions volume of POSIX.1‐2017, Chapter 11, General
Terminal Interface, termios.h(0p)
Portions of this text are reprinted and reproduced in electronic
form from IEEE Std 1003.1-2017, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The
Open Group Base Specifications Issue 7, 2018 Edition, Copyright
(C) 2018 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any
discrepancy between this version and the original IEEE and The
Open Group Standard, the original IEEE and The Open Group
Standard is the referee document. The original Standard can be
obtained online at http://www.opengroup.org/unix/online.html .
Any typographical or formatting errors that appear in this page
are most likely to have been introduced during the conversion of
the source files to man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2017 TCFLUSH(3P)
Pages that refer to this page: termios.h(0p), tcdrain(3p)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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